사실 물리에서보단 다른데서 훨씬 많이 보게된거 같지만. Matrix calculus - Wikipedia Matrix calculus - WikipediaFrom Wikipedia, the free encyclopedia Specialized notation for multivariable calculus In mathematics, matrix calculus is a specialized notation for doing multivariable calculus, especially over spaces of matrices. It collects the various partial derivativeen.wikipedia.org [Math] Matrix Calculus : Numerator Layo..